New Delhi: Leader Of Opposition In The Lok Sabha And BJP Member Sushma Swaraj Said That The Coal Scam Was The UPA's Biggest Yet. "The UPA Is Full Of Corruption. The PM Is Directly Responsible For The Scam. He Cannot Hide Behind Any Argument Now. No A Raja Or Chidambaram Can Be Used As Shield Like In The 2G Spectrum Scam Case," She Said. Leader Of Opposition In The Rajya Sabha Arun Jaitley Said That The PM "must Introspect" And Quit The Office. "In The 2G Scam, The PM Was Vicariously Liable. In This Case, He Is Poltically, Morally And Directly Liable. He Must Introspect And Impose The Moral Censure Of Quitting The Office." SOURCE  :ibnlive